<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示 -->
      <el-alert title="添加商品信息" type="info" show-icon :closable="true" ></el-alert>
      <!-- 步骤条 -->
      <el-steps  finish-status="success" :space="200" align-center :active="activeIndex-0">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
<!--      <el-button style="margin-top: 12px;" @click="next">下一步</el-button>-->
      <!-- Tab栏 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="cateList"
                           :props="cascaderProps" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item v-for="item in manyTableData" :key="item.attr_id"
                          :label="item.attr_name">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action: 图片上传的API接口地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview"
                       :on-remove="handleRemove" :headers="headerObj"
                       list-type="picture" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 npm 安装vue-quill-editor-->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品 -->
            <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewDialogVisible" width="50%">
      <img :src="picPreviewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
  //npm 安装lodash包
  import _ from 'lodash'
  export default {
    name: 'Add',
    data(){
      return{
        // 步骤条默认激活 与左侧Tab联动
        activeIndex: '0',
        //添加商品的表单对象
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_weight:0,
          goods_number:0,
          //商品所属分类数组
          goods_cat:[],
          // 图片的数组
          pics: [],
          // 商品详情描述
          goods_introduce: '',
          attrs: []
        },
        addFormRules:{
          goods_name: [
            { required: true, message: '请输入商品名称', trigger: 'blur' }
          ],
          goods_price: [
            { required: true, message: '请输入商品价格', trigger: 'blur' }
          ],
          goods_weight: [
            { required: true, message: '请输入商品重量', trigger: 'blur' }
          ],
          goods_number: [
            { required: true, message: '请输入商品数量', trigger: 'blur' }
          ],
          goods_cat: [
            { required: true, message: '请选择商品分类', trigger: 'blur' }
          ]
        },
        //商品列表
        cateList:[],
        //级联选择器配置
        cascaderProps:{
          expandTrigger:'hover',
          value:'cat_id',
          label:'cat_name',
          children:'children',
          // checkStrictly:true,
        },
        //动态参数列表
        manyTableData:[],
        //静态属性列表
        onlyTableData:[],
        // 图片上传地址
        uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
        // 图片上传组件的请求对象
        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },
        picPreviewPath: '',
        // 图片预览对话框
        previewDialogVisible: false
      }
    },
    created() {
      this.getCateList()
    },
    computed:{
      getCateId(){
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    },
    methods:{
      //获取商品分类数据列表
      async getCateList(){
        const {data:res}=await this.$http.get('categories')
        if (res.meta.status!==200){
          return this.$message.error(res.meta.msg)
        }
        this.cateList=res.data
      },
      beforeTabLeave(activeName,odlActiveName){
        if(odlActiveName==='0'&&this.addForm.goods_cat.length!==3){
          this.$message.error('请先选择商品分类')
          return false
        }
      },
      //tab标签被选中时触发
      async tabClicked(){
        //访问动态参数面板
        if(this.activeIndex==='1'){
          const {data:res}=await this.$http.get(`categories/${this.getCateId}/attributes`,{params:{sel:'many'}})
          if(res.meta.status!==200){
            return this.$message.error(res.meta.msg)
          }
          res.data.forEach(item=>{
          item.attr_vals=
            item.attr_vals.length===0?[]:item.attr_vals.split(' ')
          })
          this.manyTableData=res.data
        }else if (this.activeIndex === '2') {
          const { data: res } = await this.$http.get(
            `categories/${this.getCateId}/attributes`,
            {
              params: { sel: 'only' }
            }
          )
          if (res.meta.status !== 200) {
            return this.$message.error(res.meta.msg)
          }
          this.onlyTableData = res.data
        }

      },
      //下一步
      // next(){
      //   if(this.activeIndex++>2) this.activeIndex=0
      // },
      //级联选择器选中项变化时发出
      handleChange(){
        //如果级联选择器上面选中的不是三级的标签，那么输入框中的数据为空
        if (this.addForm.goods_cat.length!==3){
          this.addForm.goods_cat=[]
        }
      },
      //处理图片预览
      handlePreview(file){
        this.picPreviewPath=file.response.data.url
        this.previewDialogVisible=true
      },
      //处理移除图片的操作
      handleRemove(file){
        // 1.获取将要删除图片的临时路径
        const filePath = file.response.data.tmp_path
        // 2.从pics数组中，找到图片对应的索引值
        const i = this.addForm.pics.findIndex(x => x.pic === filePath)
        // 3.调用splice方法，移除图片信息
        this.addForm.splice(i, 1)
      },
      //监听图片上传成功事件
      handleSuccess(response){
        // 1.拼接得到一个图片信息对象 临时路径
        const picInfo = { pic: response.data.tmp_path }
        // 2.将图片信息对象，push到pics数组中
        this.addForm.pics.push(picInfo)
      },
      //添加商品
      addGoods(){
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return this.$message.error('请填写必要的表单项！')
          // 发送请求前：需对提交的表单进行处理goods_cat attrs
          // this.addForm.goods_cat = this.addForm.goods_cat.join(',')
          // 以上写法不对：级联选择器绑定的对象goods_cat要求是数组对象
          // 解决办法: 包：lodash 方法（深拷贝）：cloneDeep(boj)

          // 将this.addForm进行深拷贝
          const form=_.cloneDeep(this.addForm)
          form.goods_cat=form.goods_cat.join(',')
          //处理动态参数
          this.manyTableData.forEach(item=>{
            const newInfo={
              attr_id:item.attr_id,
              attr_value:item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })
          //处理静态属性
          this.onlyTableData.forEach(item=>{
            const newInfo={
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs=this.addForm.attrs
          console.log(form)
          // 发起请求添加商品
          // 商品名称必须是唯一的
          const {data:res}=await this.$http.post('goods', form)
          if (res.meta.status !== 201) {
            return this.$message.error('添加商品失败！')
          }
          this.$message.success('添加商品成功!')
          // this.$router.push('/goods')
        })
      }
    }
  }
</script>

<style scoped>

</style>
